sherman



w. s. SHERMAN.

WORK FEED TRIPPING MEANS.

APPLICATEON HLED OCT-24,1917. v

1,381,352. at t d une 14, 1921.

2 SHEETS-SHEET1- WITNESSES. v MW f JZW WW @WMJZ ATTORNEY w. s. SHERMAN; WORK FEED TREPPING MEANS. APPLICATiON FILED OCT. 24 1917. 1,381,352, Patented June 14, 1921.

2 SHEETS-SHEET 2.

WITNESSES. KWM/ ing formed at the lower ends thereof.

iently employed as the pivotal support for the stop arm 27 stands in the path of the the swinging work feed lever 16. Pairs of jam nuts 35 on the connecting rod 33 form adjustable spring seats for a compression spring 36 hearing on the upper face of the projection 31. of stop arm 27, and for a compression spring 37 hearing on the lower face of said projection.

' The other arm of double crank 34 is connected by a connecting rod 38 with the lower end of clutch can lever .26, the said coni nccting rod sliding through the end of the clutch cam lever and having compression springs 39 and L seated on adjustable set nut seats 41 thereon and bearing on opposite sides of the clutch cam lever.

Hangers or bracket bearings 4:2,which may incidentally constitute stops for the hook bars of the machine are suitably, fastened to the frame so as to be immovable, and a trip lever shaft 43 is journaled in the bear- This trip'lever shaft has a pair of trip levers or arms 4a formed on it or otherwise 1' id therewith and these trip levers or arms 414s are normally engaged by hooks 4:5 pivotally suspended from bolts 46 projecting inwardly from the hanger brackets 12. engagement of the hooks 4:5 prevents the downward movement of the arms i l and said arms have arc-shaped projections on their ends for permitting them to return into engagement with the hooks after they have been released thereby. The trip lever shaft 43 also has fixed on it at one end, a crank arm l? which is connected by a connecting rod 48 with the end of stop arm 27, this connection between the connecting rod .1.8 and the stop arm 27 being preferably made adjustable by thereonnectingrod fitting in an eccentric opening in a bushing l9 rotatable in a cylindrical sleeve on the end of the stop arm and held in'its adjustments by a set screw 50.

Each hook 4L5 has a connecting rod 51 connecting it with an adjusting collar 52 on a contact finger 53. These contact fingers 53 are loosely mounted on a shaft 54L which is suitably supported by having its ends fitting in the grooved guides formed by the head block 13 and through which the hook bars travel. The contact fingers are locked with their lower ends as close as possible to the line of travel of the hook bars and are rotatably adjustable within their adjusting collars 52 so that a line connecting them would be at right angles to the direction of the feed of the work through the machine. The lower ends of the contact fingers project into the work feeding passageway to be engaged and swung when a strip of work is inserted in the work feeding passageway and is pressed in the direction of feed.

The arrangement of the compression springs is such that in the normal position of the parts, as shown in Fig. 1,, spring 39 is under compression tending to throw the clutch cam lever 26 so as to move the cam segment 24: out of the clutch groove to permit the engagement of the clutch for start-- ing the work feeding lever 16 in motion. This action, however, is prevented by the engagement of the lug 28 of the stop arm with the notch of the clutch cam lever 26. Also spring 36 is under compression tending to swing the stop arm 27 upwardly out of its engagement with the clutch cam lever 26, but this action is prevented by the inability of the trip lever shaft 4:3 to turn, owing to the engagement of the hooks with the levers 44 thereof. The proper introduction of the work, however, which causes both contact fingers to swing and pull the hooks 45 out of engagement with the levers lat. removes this obstacle and the shaft 43 is turned and the stop arm 27 is raised by the pressure of the spring 36 on the projection 31. This lifting of the stop arm removes the lug 23 from engagement with the clutch cam lever and the spring 39 throws the latter to remove the cam segment from the groove of the clutch, whereupon the clutch pin 21 engages one of the teeth of the clutch head 23 for coupling the driven parts with the driving shaft for one cycle of operation of the work feeding means. The

clutch cam lever 26 engages the stop 29 for n lltlll its movement in withdrawing the cam segment from the clutch groove.

In performing its cycle of operation, the work feeding means changes the condition of the various springs so as to restore the parts to their normal positions. The shaft 1'7, which forms a part of said work feeding means, being rigidly connected with the work feeding lever 16, which operates the work feeding bars 15. serves to oscillate the double crank 3%. in the first part of its movement, to the left as shown in Fig. 1, it serves to compress spring lO and by means thereof return the clutch cam lever 26 to the position in which its cam segment enters the clutch groove. At the same time spring 3'? is compressed to return. the stop arm 2'? to its position for engaging and holding the contact fingers the hooks are free toreengage the levers 44 and thus lock all parts in their normal positions during the return lio'vement of the. double crank 34:, to the right as shown in Fig. 1. During this return movement of the double crank 34 the only change that takes place in the clutch-actuating mechanism is the removal of pressure from springs 40 and 37 and the compression of'springs 39 and 36 to prepare them for the succeeding releasing operation.

It will be understood that inasmuch as the release of the clutch depends upon the movement of both contact fingers to withdraw both hooks 4-5, the proper positioning of the work in'the work feeding passageway is as surcd. Should the work be introduced at an angle to its true position as shown at w in Fig. 2, so that its rear edge is not in p0- sition to be engaged by the hooks of both work feeding hook bars only one contact finger 53 would be swung and consequently only one hook 45 would be released from its engagement with the trip lever shaft and the other would remaln to prevent the operation of the clutch. Should the work be deliberately pushed into the machine in this position, the clutch woulo not be operated until the second contact finger 55 is swung and at such time the rear edge of the work would be in position to he engaged by the hooks of both hook bars and the correction in the position of the work would'be performed by the feeding mechanism and the cooperation of the pressure bars therewith in a; manner forming no part of the present 7 invention.

The work feed tripping means of this invention requirin the joint operation of two triggers spaced apart prevents the feeding mechanism being started in operation at a time when the descent of one hook bar would bring its hook down in advance of the rear edge of the work, thus preventing a properengagement with the work and possibly resulting in an injury to the machine.

This application in part constitutes a di vision of my application Serial No. 84 l,936,

for end matchers, filed June 13, 1914.

erated means connected with the dog for releasing the dog from engagement with the pin-releasing lever, a rod connecting the pinreleasing lever with an operated part of the machine for receiving movement therefrom,

and springs on said rod bearing on opposite sides of the pin-releasing lei er.

- l machine havin definite cycle of: operatu a pin clutch establishing connection between the driving and driven parts thereof, pin releasing means having a tendency to move away from the clutch, a do for holding the pin releasing means in *geinent with the clutch, and means operated by the movements of the machine for returning the pin releasing means to its engagement with the clutch.

In a machine having a definite cycle of o eration, a pin clutch connecting together thdriving parts and the driven parts thereor, a pin releasing member, having a tendency to move away from the clutch, a suitably released dog engagingthe pin releasing member holding it in engagement with the clutch, and means operated by the movements of the machine for returning the pin releasing member to its engagement with the clutch and for reengaging the dog there-- with.

4-. In a machine having a definite cycle of operation, a pin clutch for connecting the driving and driven parts thereof, a spring retracted pin releasing lever adapted to enter the groove ofvthe clutch to disengage the clutch pin, a spring retracted dog fOr holding the pin releasing lever in the clutch groove, means for holding the dog in engagemont with the pin releasing lever, and means set in motion by the cycle of operation of the machine for moving the pin releasing lever into the groove of the clutch and for moving the dog into engagement with the pin releasing lever.

In a machine having a definite cycle of operation, pin clutch connecting the driving parts and the driven parts thereof, a pin releasing lever for the clutch, a dog for holding the pin releasing lever in its engagement with the clutch, means for releasing the dog, and means operated by the machine during its cycle of operationfor moving the pin releasing means and the dog to their engaging positions and then subjecting them to sprin action tending to move them from such positions.

6. In a machine having a definite cycle of operation, a pin clutch connecting the driving and driven parts thereof, a pin releasing means for the clutch, a releasable dog for holding the pin releasing means in engagement with the clutch, and means operating tion for first moving the pin releasing means operated by the movements of the machine during its cycle of operation for returning the pin releasing means to the clutch and then giving it spring pressure away from the clutch, and a suitably releasable dog for engaging and holding the spring releasing member inengagement with the clutch against the action of such spring pressure.

8. In a machine having a definite cycle of operation, a pin clutch for connecting the driving parts and the driven parts thereof, a pin releasing lever having a cam segment for engaging and releasing the pin of the clutch, a pivotally mounted stop arm engaging the pin releasing lever, and reciprocating rods passing through the pin engaging lever and the stop arm respectively and having springs with adjustable spring seats and bearing on opposite sides of the pin releasing lever and the stop arm, said rods having operative connection with the machine to be reciprocated thereby with each cycle of operation.

9. In a work feeding means having a definite cycle of operation, a clutch for connecting the driving parts with the driven parts thereof, a means for operating the clutch, and a pair of triggers for controlling the operating means and adapted to be engaged and moved jointly by the work in order to operate the clutch to start the work feeding means.

10. In a work feeding means for wood working machinery, a pair of triggers positioned at definite points for engagement with the work when the work is properly presented to the machine, and operating mechanism independently restrained by the said triggers and requiring the joint opera tion of the triggers for its release.

11. In a work feeding means for wood working machines, having work engaging means adapted to be operated at certain points, a pair of triggers in position to be engaged by the work only when the work is in position to be engaged at such points, and operating means independently restrained by said triggers requiring the joint operation of the triggers for its release.

12. In a work feeding means for wood working machines, a pair of triggers positioned in the path of the work on being properly introduced, hooks connected with the triggers, a shafthaving arms engaged by the hooks, and a clutch controlling means connected with the shaft for starting the machine in operation when the arms are released by the hooks.

13. In a clutch controlling means for the work feeding mechanism of wood working machines, a pair of triggers in position to be engaged. by the work on its proper introduction to the machine, hooks connected therewith, a shaft having arms engaged by the hooks, a dog connected with the shaft, and clutch operated means having a tendency to move in one direction and engaged and held by the dog.

14:. A clutch operating means for the work feeding mechanism of wood working machines, comprising a pair of triggers 1n position to be engaged by the work when the work is properly presented to the machine, a pair of hooks connected with the triggers, a shaft having arms engaged by the hooks, a crank arm on the shaft, a pivotally mounted dog, a connecting rod connecting the dog with the crank arm, a pin clutch for connecting the driving parts of the work feeding mechanism with the driven parts thereof, and a pin releasing member having a tendency to move away from the clutch and held in engagement with the clutch by said dog.

15. A clutch operating means for the work feeding mechanism of wood working machines, comprising a pair of contact fingers forming triggers in position to be engaged by the work when it is properly presented to the machine, arms adjustably mounted on the triggers, connecting rods connected with said arms, hooks connected with the connecting rods, a shaft having arms engaged by the hooks, a crank arm on the shaft, a pivotally mounted stop arm, a connecting rod on the crank arm having adjustable connection with the stoparm, a pin clutch for connecting the driving parts of the work feeding mechanism with the driven parts thereof, a pin releasing lever engaging the clutch pin, a lug on the stop arm engaging the pin releasing lever, and reciprocating rods operated by the work feeding means and having spring engagement with the opposite sides of the pin releasing lever and the stop arm respectively.

In testimony whereof, I affix my signature, in presence of two witnesses.

WILLIS S. SHERMAN.

Witnesses:

R. 'S. C. CALDWELL, H. D. CHAsE. 

